@Lisa1307 @Vera314 @Marie82
I recently hosted a Guest who removed the pillow from inside the pillow case & inserted Towels as they preferred to sleep on a firmer surface & didn't like pillows.
Another guest travels with their childhood pillow case covers when away from home as it reminds them of their family when so many miles away.
There's all manner of people out in the big wide world & perhaps it's best to ask oneself, "Is the Guest's comments/ request a one off and best just swept aside or should it be taken as constructive feedback?"
Maybe ask future guests, if you can, what they think of the pillows & if they found them comfortable etc.
I've a friend who doesn't like Down feather pillows because of the way the birds are kept & processes they go through, others hate synthetics .
"We can't please all people all if the time but we can please them some of the time".
All the best.